I've had cars that were 15+ years old and I've never replaced a brake line.
About a month ago, a woman at work had to replace a corroded brake line on
her '01 Taurus. Today, I replace a brake line on my '01 LeSabre. This is
in CT where there is snow and the roads are salted so corrosion does happen.
Just that I've never encountered replacing a line in 47 years of owning cars
and now I know of two in a short time.
I think it depends on the construction of the lines. I've had exactly
two fail on me and both cars were pushing 20 years old. I think those
little coil armor things trap dirt and gunk and accelerate rusting; also
some manufacturers spec better coatings than others on the brake lines
(German cars typically have a green coating on the brake lines that
seems to do a better job than the normal terne plating.)
Replacing rusted segments with stainless isn't a bad idea on a car you
plan to keep forever...
replace "roosters" with "cox" to reply.
I've had a few brake lines rust through on older cars - Chicago.
Cars were at least ten years old though.
Sounds like bad materials or placing the lines where they are subject
to collecting/keeping moisture.
Maybe dirt doesn't naturally get washed off.
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